论文部分内容阅读
随着《国家公路网规划》的发布,中国又将掀起一轮新的公路建设高潮,而国省道改扩建工程将是重中之重。改扩建工程牵涉面广、技术复杂,一度成为科研的热点与难点。在国道G321桂阳段改扩建工程(No.1标段)中,存在扩容方案选择、设置挡墙段的新老路基处治及原路行道树保存三大技术难点,基于以往的改扩建经验,对其展开深入分析,最终确认了“单侧加宽为主,双侧加宽为辅”的扩容方案,制定了开挖台阶等一系列新老路基处治措施,拟定了将原路行道树保存于扩建后中分带及侧分带的实施方案,达到安全、经济、环保、美观的实施效果。
With the release of the “National Highway Network Plan,” China will once again set off a new upsurge of road construction, while the provincial-level highway reconstruction and expansion project will be the top priority. The expansion and expansion project involves a wide range of technical complexity, has become a hot and difficult scientific research. In G321 Guiyang Section National Highway Extension and Extension Project (No. 1), there are three major technical difficulties in selecting expansion plans and setting new and old roadblocks for retaining wall sections and preserving original roadside trees. Based on the experience of renovation and expansion in the past, It has carried out in-depth analysis and eventually confirmed the expansion plan of “widening on one side and widening on the other side as a supplement.” A series of new and old measures for excavation of steps have been worked out and a plan has been drafted to save the original roadway trees After the expansion of the middle and sub-zoning implementation plan to achieve safety, economy, environmental protection, aesthetic effect of the implementation.